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// Portions Copyright [2018] Payara Foundation and/or affiliates

package org.glassfish.config.support.datatypes;

import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.config.DataType;
import org.jvnet.hk2.config.ValidationException;

/** Represents an integer from 0 to Integer.MAX_VALUE. 
 *  It's modelled as a functional class.
 * @author &#2325;&#2375;&#2342;&#2366;&#2352 (km@dev.java.net)
 */
@Service
public class NonNegativeInteger implements DataType {

    /** Validates the value as a non-negative integer.
     * @param value
     * @throws org.jvnet.hk2.config.ValidationException
     */
    @Override
    public void validate(String value) throws ValidationException {
        if (value == null)
            throw new ValidationException("null value is not of type NonNegativeInteger");
        if (isTokenized(value))
            return; //a token is always valid
        try {
            long number = Long.parseLong(value);
            if (number < 0 || number > Integer.MAX_VALUE) {
                String msg = "value: " + number + " not applicable for NonNegativeInteger [0, " + Integer.MAX_VALUE + "] data type";
                throw new ValidationException(msg);
            }
        } catch(NumberFormatException e) {
            throw new ValidationException(e);
        }
    }
    
    /*package*/
    static boolean isTokenized(String value) {
        return value != null && value.startsWith("${") && value.endsWith("}");
    }
}
